Cecil Moore wrote:

Jim Kelley wrote:

Richard Harrison wrote:

When the source end of a transmission line is effectively a short or
open circuit, ir re-reflects the reflected wave.


Are we then supposed to infer that it [the source] doesn't re-reflect
the wave if anything other than a short or open circuit appears there?


To that list of two, we can add two more. If the source end of a
transmission line is terminated in a pure reactance, it re-reflects
the reflected wave.

When 100% wave cancellation of reflected waves occurs at the source
due to total destructive interference, it re-reflects the reflected
wave energy components as constructive interference energy in the
opposite direction. Anything else would violate the conservation
of energy principle.

In other words a system in which all of the power from the source
reaches the load and none is reflected back to the source without first
reflecting then re-reflecting would violate conservation of energy.

It's like saying a ball violates conservation of energy if it rolls down
hill without first passing through a Rube Goldberg contraption.

jeez, ac6xg